Daily Digest: Bad news for lazy dogs, plus 9 more stories

A dog wears a new device called Whistle that lets pet owners track how much exercise — or sleep — their four-legged friends are getting. (Whistle Labs, The Associated Press)

With the Colorado state capitol building visible in the background, partygoers dance and smoke pot on the first of two days at the annual 4/20 marijuana festival in Denver, Saturday April 19, 2014. The annual event is the first 420 marijuana celebration since retail marijuana stores began selling in January 2014. (AP Photo/Brennan Linsley) (Brennan Linsley/AP)